Evaluation of Removability of Root Canals Filled Using Bioactive Glass Based Sealer

DOI Open Access
  • Ayako WASHIO
    Division of Endodontics and Restorative Dentistry, Department of Science of Oral Functions, Kyushu Dental University
  • Shinji YOSHII
    Division of Endodontics and Restorative Dentistry, Department of Science of Oral Functions, Kyushu Dental University
  • Takahiko MOROTOMI
    Division of Endodontics and Restorative Dentistry, Department of Science of Oral Functions, Kyushu Dental University
  • Chiaki KITAMURA
    Division of Endodontics and Restorative Dentistry, Department of Science of Oral Functions, Kyushu Dental University

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  • バイオガラス配合シーラーを用いた根管充塡材の除去に関する検討

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<p> Purpose: For endodontic re-treatment, the removal of root canal-filled material and patency of root apex are essential. In the present study, we examined the removability of a newly developed bioactive glass based sealer (BG based sealer) from a root canal, and analyzed the dentin surface of the root canal after re-preparation and irrigation.</p><p> Methods: Four weeks after filling human extracted teeth with each sealer (eugenol based, non-eugenol based, bioceramic based, and BG based sealers), each root canal-filled material was removed by a gutta-percha removal instrument. The ability to regain the working length (WL), patency of root foramen, and time for removal were examined. Additionally, the dentin surface of the re-prepared root canal was analyzed by FE-SEM.</p><p> Results: In the removability test, WL gain and patency of root foramen to the root canal filled by BG-based sealer were possible as seen in other sealer groups. FE-SEM analysis showed that dentin tubules in the coronal and middle third of root canals were opened, whereas the number of opened dentinal tubules was low in the apical third as seen in other sealer groups.</p><p> Conclusion: BG based sealer showing suitable properties as a sealer was able to be removed from the root canal, suggesting that root canals filled with BG based sealer can be retreated.</p>

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